Sewage septic tank



FIG. 1 is a top view of a sewage septic tank showing our new design;

FIG. 2 is a bottom view of the tank;

FIG. 3 is a side elevational view of the tank;

FIG. 4 is an outlet end view of the tank;

FIG. 5 is an inlet end view of the tank; and,

FIG. 6 is a perspective view of the tank. 

The ornamental design for a sewage septic tank, as shown. 